package com.java.util;

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * @Author: YNB
 * @Description:
 * @Date Created in 2021-01-02 10:28
 * @Modified By:
 */
@Component
public class DateUtil  implements Converter<String, Date> {
        private static final List<String> formarts = new ArrayList<>(4);

        static {
            formarts.add("yyyy-MM");
            formarts.add("yyyy-MM-dd");
            formarts.add("yyyy-MM-dd hh:mm");
            formarts.add("yyyy-MM-dd hh:mm:ss");
        }

        @Override
        public Date convert(String source) {
            String value = source.trim();
            if ("".equals(value)) {
                return null;
            }
            if (source.matches("^\\d{4}-\\d{1,2}$")) {
                return parseDate(source, formarts.get(0));
            } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$")) {
                return parseDate(source, formarts.get(1));
            } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}$")) {
                return parseDate(source, formarts.get(2));
            } else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}:\\d{1,2}$")) {
                return parseDate(source, formarts.get(3));
            } else {
                throw new IllegalArgumentException("Invalid boolean value '" + source + "'");
            }
        }

        /*** 格式化日期 * @param dateStr String 字符型日期 * @param format String 格式 * @return Date 日期 */
        public Date parseDate(String dateStr, String format) {
            Date date = null;
            try {
                DateFormat dateFormat = new SimpleDateFormat(format);
                date = dateFormat.parse(dateStr);
            } catch (Exception e) {
            }
            return date;
        }

}
